Sunset alarm :)

Around the time of the sunset our dog was finally drained of energy! 
Today I played frisbee with her during the morning walk and teached her to run by the side of the bicycle for lunch time. These exercises just warmed her up. BUT THEN we walked with her for another two hours, including some hundreds of height meters. We let her chase the prey dummy and the ball, and on the way down she was very entertained by running-jumping down the sledging trail (with bumps and all...) high speed to sledge down with her bum in the end, running back up to collect a treat and start anew, and again, and again! 
Right now I am not sure how I can motivate her for the late evening walk, she lies there like dead, barely looks up, and only grunts from time to time ;) A good way to knacker out a dog!